API-571 exam

Equipment that is temper embrittled may be susceptible to _______ during start-up and shutdown.A . CreepB . Thermal fatigueC . Brittle fractureD . Stress fatigueView AnswerAnswer: C

In susceptible materials, the primary factor that affects sigma phase formation is the ________ at elevated temperatures.A . Time of exposureB . PressureC . StressD . VelocityView AnswerAnswer: A

Fatigue will not occur in carbon steel if stresses are below the:A . Transition limit.B . Endurance limit.C . Hardening limit.D . Speed limit.View AnswerAnswer: B

Localized corrosion due to the concentration of caustic or alkaline salts that usually occurs under evaporative conditions is _________.A . Carbonate corrosionB . Caustic corrosionC . Alkaline corrosionD . None of the aboveView AnswerAnswer: B

Hydrogen blisters may form at many different depths from the surface of the steel, in the middle of the plate or near a weld. In some cases, neighboring or adjacent blisters that are at slightly different depths (planes) may develop cracks that link them together. Interconnecting cracks between the blisters...

Reheat cracking is most frequently observed in _______ grained sections of a heat-affected zone.A . CourseB . FineC . DenseD . TreatedView AnswerAnswer: A

For 5Cr-0.5Mo, what is the threshold temperature for creep?A . 500º FB . 800º FC . 600º FD . 700º FView AnswerAnswer: B

Hardness is primarily an issue with SSC. Typical low strength carbon steels should be controlled to produce weld hardness less than ________.A . 225 BHNB . 237 BHNC . 200 BHND . 240 BHNView AnswerAnswer: C

Cracking of dissimilar weld metals occurs in the __________ side of a weld joining 300 Series SS and carbon steel.A . AusteniticB . FerriticC . Both of the aboveD . None of the aboveView AnswerAnswer: B

Changing to a more corrosion resistant and/or higher hardness material _________ improve cavitation resistance.A . WillB . MayC . Will notD . May notView AnswerAnswer: D